How do factories make milk jugs?
The manufacture of large plastic milk jugs involves a blow-mold process, where hot molten plastic is inserted into a metal cast and infused with a blast of air to make the milk container. This type of machine is large and expensive, with each can weighing several tons.Raw MaterialThe raw material for making a plastic milk jug is solid-white plastic pellets, which are then melted down into a liquid form by the application of heat and friction. The blow-mold machine has an internal mechanism for melting the plastic.PreparationBefore the complete jug is made, a small amount of molten plastic is forced into an empty chamber. Then air is blown into the center of the plastic, forcing the molten material to expand against the wall of the chamber.Release of the JugThe mold has two halves, which fold apart after the jug has been formed and cooled. The jug is then dropped onto a conveyor belt to be taken to a trimming area.SizeFor a piece of plastic manufacturing machinery the extrusion blow-mol
